Combat Rigs (also known as simply Rigs) are customizable armor suits designed to enhance and withstand battles on land and in space in Call of Duty: Infinite Warfare. They are a set of weapon systems created by different manufactures and designed for certain factions. They are similar to the Specialists from Call of Duty: Black Ops III. They are customizable and the player can freely switch between Rigs during a match. Each Combat Rigs caters to different playstyles, and each has a set of three Payloads and three Traits, which are weapons, abillites, and persistent perks available to the player.

Unlike Call of Duty: Black Ops III's personality driven Specialists, the human inside the Combat Rig suit doesn't speak at all unless they give out call-outs or scream. Players are given the option of choosing a Male or Female voice. The reasoning behind this is because the character inside the Combat Rig is supposed to be the player, according to Infinity Ward.

There are three Rigs available from level 1, with only their first Payload and Trait available; Warfighter, Merc, and Synaptic. FTL's first payload and trait are available at level 15, Stryker's first payload and trait are available at level 23, and Phantom's first payload and trait are available at level 30.

Outside of payloads and traits, gameplay is identical for all Rigs. Each Rig has customizable armor which is purely aesthetic.

Because there are no differences in Rig appearances by team nor are there any team based specalists, in order to make it easier for players to spot an enemy all hostile Rigs have a red-colored logo of their faction's insignia on each of their shoulders, while players on the user's team sees a blue insignia.